I think I was thinking of kramarczuks. Well if there's nothing in the cities, northern waters smokehaus in Duluth makes an awesome Greek sausage, though I don't know if it's exactly what you're looking for. They do mail order, and Eric the owner may even be open to making a special sausage blend to order.

just thought of another possibility: wisconsin is big on sausage making in butcher shops. as a matter of fact, i read a book from the library about a year ago that had found and was documenting bakeries, butchers, and cheese shops in wisconsin that were small family operated establishments-many handed down generationally. there were a lot of them-all over the state. anyway, look online for wisconsin butchers. maybe that would be a possibility.